package Adrian_Kozica;

import java.util.Map;

public class Info_sys {

	public static void main(String[] args) {
		Map<String, String> syst = System.getenv();
		System.out.println(syst.get("OS"));
		System.out.println(syst.get("COMPUTERNAME"));
		System.out.println(syst.get("USERNAME"));
	}
}
